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Old 04-23-2013, 08:47 PM   Thread Starter #1
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Default Engine Code

last week i installed spacer kit and had this noise which im told you will get after spacer install whislte noise and today i got P0420 code Catalyst System Efficiency Below Threshold bank 1, but i had nissan in april of 2011 replaced that cat and o2 sensor under warranty so my question is can a intake leak cause this code because i've been hearing more of a suction noise around 3000rpm and not a whistle? i have video and will post after 9 because its on my phone its dead need to charge then will post video.
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Old 04-23-2013, 11:23 PM   Thread Starter #2
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Default Re: Engine Code

IMG_4500_zpscea96917.mp4 Video by bhp4202 | Photobucket first part of video is the noise.
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Old 04-24-2013, 01:46 AM   #3
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Default Re: Engine Code

OBD2-OBDII Engine Light Trouble Code P0420 NISSAN - Catalyst System Efficiency Below Threshold Bank 1 | Engine-Codes.com

Some good info there might help you..
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